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<?php
class FormatFactory
{
private array $formatNames = [];
public function __construct()
{
$iterator = new \FilesystemIterator(__DIR__ . '/../formats');
foreach ($iterator as $file) {
if (preg_match('/^([^.]+)Format\.php$/U', $file->getFilename(), $m)) {
$this->formatNames[] = $m[1];
}
}
sort($this->formatNames);
}
public function create(string $name): FormatAbstract
{
if (! preg_match('/^[a-zA-Z0-9-]*$/', $name)) {
throw new \InvalidArgumentException('Format name invalid!');
}
$sanitizedName = $this->sanitizeName($name);
if (!$sanitizedName) {
throw new \InvalidArgumentException(sprintf('Unknown format given `%s`', $name));
}
$className = '\\' . $sanitizedName . 'Format';
return new $className();
}
public function getFormatNames(): array
{
return $this->formatNames;
}
protected function sanitizeName(string $name): ?string
{
$name = ucfirst(strtolower($name));
// Trim trailing '.php' if exists
if (preg_match('/(.+)(?:\.php)/', $name, $matches)) {
$name = $matches[1];
}
// Trim trailing 'Format' if exists
if (preg_match('/(.+)(?:Format)/i', $name, $matches)) {
$name = $matches[1];
}
if (in_array($name, $this->formatNames)) {
return $name;
}
return null;
}
}
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